[tex]\rm Inversul~unui~numar~real~nenul~x~este \frac~{1}{x}. \\ \\ Inversul~lui~ \frac{3}{5}~este~ \frac{1}{ \frac{3}{5} } = \boxed{\frac{5}{3}}. \\ \\ Inversul~lui~1,2~este~ \frac{1}{1,2}= \frac{1}{ \frac{12}{10} } = \frac{10}{12}= \boxed{ \frac{5}{6} } .[/tex]
